12V DC to 220V AC Inverter Circuit & PCB

Overview

The post is about 12V DC to 220V AC inverter circuit designed with few easily available components. Inverters are often needed at places where it is not possible to get AC supply from the Mains. An inverter circuit is used to convert the DC power to AC power. Inverter Circuit are very much helpful to produce high voltage using low voltage DC supply or Battery. DC-DC Converter circuit can also be used but it has certain voltage limitations.

The 12V DC to 220V AC inverter circuit is designed using IC CD4047. The IC CD4047 acts as a switching pulse oscillating device. The n-channel power MOSFET IRFZ44n acts as a switch. The 12-0-12V secondary transformer inversely used as a Step-up transformer from converting low AC to High Ac.

Components Required

The following components are required for making this Inverter project.

1. IC CD4047
2. IRFZ44 Power MOSFET – 2
3. 12-0-12/1A Secondary Transformer
4. 22KΩ Variable Resistor
5. 100Ω/10W Resistors – 2
6. 0.22µF Capacitors
7. 12V Sealed Lead Acid Battery

Circuit Diagram & Construction

The Circuit Diagram shown above is the tested 12V DC to 220V AC Inverter Circuit. It uses 2 power IRFZ44 MOSFETs for driving the output power and the 4047 IC as an astable multivibrator operating at a frequency of around 50 Hz.

The 10 and 11 pin outputs of the IC directly drive power MOSFETs that are used in push-pull configuration. Use suitable heat-sinks for MOSFETs as it will produce a huge amount of heat. The output transformer has a 12V-0-12V, 1 Amps on the secondary and 220V on the primary.

Working of the Circuit

The IC CD4047 is configured in astable multivibrator mode with the help of variable resistor RV1 and capacitor C1. By varying the value of RV1 we can get a different range of output pulse at Q and Q’ pins of CD4047. Consequently, there is a variation in the output voltage at the transformer.

The n-channel power MOSFETs IRFZ44 Drain pins are connected with the transformer secondary pins and common pin in the secondary winding is connected with battery positive. Both MOSFET source pins are connected to the negative terminal of the battery. When the alternate square pulse from Q & Q’ drives the MOSFET, it switches ON. Then the secondary winding is forced to induce an alternate magnetic field. This magnetic field induced produces high alternate voltage around 220V.

Circuit Simulation

The circuit was simulated using Proteus. The simulation gave the desired result as shown in the screenshot below.

You can also check this circuit: 12V to 24V Voltage Doubler Circuit

PCB Designing & Ordering Online

If you don’t want to assemble the circuit on a breadboard and you want PCB for the project, then here is the PCB for you.

First I designed the Schematic using EasyEDA. Then I converted the schematic to PCB. The PCB Board for 12V-to-220V Inverter looks something like below.

The Gerber File for the PCB is given below. You can simply download the Gerber File and order the PCB from ALLPCB at 1$ only.

You can use this Gerber file to order high quality PCB for this project. To do that visit the ALLPCB official website by clicking here: https://www.allpcb.com/.

You can now upload the Gerber File by choosing the Quote Now option. From these options, you can choose the Material Type, Dimensions, Quantity, Thickness, Solder Mask Color and other required parameters.

After filling all details, select your country and shipping method. Finally you can place the order.

We also made a better version of the Inverter using SG3525 IC. You may follow SG3525 PWM Inverter circuit for learning more about the 300W PWM Inverter.